Electric verifying machine



F. R. JONES ELECTRIC VERIFYING MACHINE Filed March 22, 1930 4 Sheets-Sheet l FIG. 1.

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7 ELECTRIC VERIFYING MACHINE Filed March 22, 1930 4 Sheets-Shet 2 Oct. 9, 1934. F. R. JONES 1,976,515

ELECTRIC VERIFYING MACHINE Filed March 22, 1930 4 Sheets-Sheet 5 N A a Elnoeutoz 15 4 awe/mug??? Oct. 9, 1934. F R} JONES 1,976,615

ELECTRIC VERIFYING MACHINE Filed March 22, 1930 4 Sheets-Sheet 4 FIE-3.8.

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uwntoz &4 1 W Patented Oct. 9, 1934 PATEN r orrlca 1,976,615 I ELECTRIC VERIFYING MACHINE Fred Rolland Jones, Des Moines, Iowa, assignor. by mesne assignments, to International Business Machines Corporation, New York, N. Y., a

corporation of New York Application March 22,

Claims.

This invention relates to certain new and useful improvements in verifying machines.

In tabulating machine wcrk,'data are tabulated by punching differentially spaced holes on 5 record cards. The. machine for carrying out the punchingoperation may be the Schaaff machine shown in Patent No. 1,134,018. In this machine the punching operation is performed by depressing. certain keys. Operators using themachine sometimes depress the wrong key and incorrect dataare then tabulated upon the card. It has 1 1 therefore been found that usually the punched ;.-;-;:;.cards must be checked to determine if any errors have been made. Often this checking is done by a visual inspection of the cards but this method time consuming operation.

.The present invention is directed to a machine if. in which the punched cards may be placed and the errors detected. The operation of checking is exceedingly rapid and the possibility of checkers errors being identical with punching operators errors is largely eliminated.

The verifying machine is provided with keys similar to those in the card punching machine and the checker operates the keys just as if anew card were being punched. If a card is correctly punched the record card carriage feeds forward upon thedep'ression of each key; but if a punch hole is incorrectly spaced in the card, the carriage does not feed forward thereby apprising the checker of the error in the card.

Heretofore in verifying machines, mechanical devices have been employed to sense the card to detect the presence or absence of a perforation.

One of the objects of the present invention is to i provide electrical card sensing devices for determining the correctness of the perforations in the card.

\ In its preferred form the invention consists of a set of independent sensing brushes adapted to make contactwith a common contact roller through the perforations in the card and establish electric circuits through devices adapted to lock the machine against operation. When a card column containing a perforation is preser ted to the sensing brushes, a circuit will immediately be established through the locking devices. If, however, the proper, or corresponding key is depressed, it' will negative the effect of the locking circuit. I

ZWhe're a card having multiple punching is being 1930, Serial No. 438,085

verified, it will be necessary to depress the several keys corresponding to the several index point positions of the multiple combination being 7 checked.

' Various other objects and advantages of my invention will be obvious from the following particular description of one form of mechanism embodying the invention or from an inspection of the accompanying drawings; and the invention also constitutes certain new and novel features of construction and combination of parts hereinafter set forth and claimed. I

In thedrawings:

Fig. 1 is a plan view of the complete machine.

Fig. 2 is a section through the punching mechanism of the machine. v I

Fig. 2a is a detail view of a contact device.

Fig. 3 is a. detail of the, machine'locking device.

Fig. 4 is a detail illustrating the manner of operating a special control contact.

. Fig. 5 is a further detail of parts for operating the contact of Fig. 4.

Fig. 6 isa wiring diagram of the electric circuit of the machine. i

Fig. '7 is a position view of parts shown in Fig. 2. 1

Fig. 8 is a section taken on line 8-8 of Fig. 2 disclosing the arrangement of the card sensing brushes.

Fig. 9 is a section taken on line 99 of Fig. 2.

Card feeding mechanism In the accompanying drawings, in Figs. 1 and 2, the perforated card 10 is manually inserted between a card pusher 11 and a forward guide 12 with the first column of the card coinciding with a colunm of analyzing brushes 13 adapted to make contact through holes in the card with a common roller 14 insulated from the frame of the machine (see also Fig. 8). Thepusher 11 and guide 12 are attached to a rack bar 15 which is suitably supported and guided by rollers 16 which cooperate with rail structure 17 integral with the frame of the machine. The rack bar 15 is normally urged to the left in Fig. 2 by a spring mechanism (not shown) and a suitable escape mechanism comprising pawls 19 and 20 cooperates with a bar 15 to permit step by step movement thereof to the left. Y

The normal position of the parts is as shown in Fig. 2, wherein pawl 19 engages bar 15 to hold the carriage in analyzing position. A shaft 21 when rocked in a counterclockwise direction is adapted to permit step by step advance of bar 15 in the following manner. Secured to the end of shaft 21 is a double armed lever 22 having a pin in one arm extending into an enlarged opening in pawl 19. A second pin in the other arm fits in a slot in pawl 20. As the shaft 21 and arm 22 are rocked, the pins will cooperate with the pawls 19 and 20 which is pivoted at 20a to lower pawl 20 into engagement with bar 15, holding it in position while pawl 19 is raised out of cooperation with the bar. Pawl 19 is provided, as is usual with escapement mechanisms of this type, with a slot and spring which permit the WWII to advance slightly to the right so that upon return of arm 22 to its initial position'the pawl 19 will engage the next succeeding tooth in bar 15. The shaft 21 has mounted thereon a bail 23 extending transversely beneath a series of interposer bars 24. Depression of any of the bars 24 will actuate the bail 23 to rock the shaft 21.

Operation of the numeral keys In Fig. 1 the machine is shown as being provided with a plurality of keys 25, one for each of the index point positions of the well known Hollerith tabulating card. In Fig. 2 each of these keys has connection to an arm of a pivoted bell crank 26 which in turn has pin and slot connection 27 with a corresponding interposer bar 24. A spring 28 is adapted to normally maintain interposer bar 24 in its right hand position as in Fig. 2, wherein the insulated right end of each bar will maintain a related contact 29 in closed position. Depression of any key is adapted through its bell crank 26 to move its corresponding interposer bar 24 to the left to open its corresponding contact 29. The forward end of each of the interposer bars 24 is cut away as at 30 and rests upon a spring pressed plunger 31 which is adapted to normally hold the forward end of the interposer in its raised position as shown. The advancement of any interposer by depression of its corresponding key moves such bar to a position as shown in dotted lines in Fig. 2. An actuating bar 32 pivoted at 33 is adapted to be rocked in a counterclockwise direction to depress such bars 24 as may have been advanced by their respective keys. Any depression of a bar 24, as we have seen, will through the bail 23 and the shaft 21, cause the operation of the escape mechanism already described to permit advance of the record card carriage rack 15. A magnet 34 is adapted upon attraction of its armature 35 to rock a bell crank 36 to which said armature has link connection. A link 37 connecting the actuating bar 32 with one arm of the bell crank 36 serves to operate said bar whenever magnet 34 is energized.

Intcrposer bar locking device Each of the interposer bars 24 is provided with a recess 38, one side of which cooperatw with a bail 39 pivoted at 39a. Depression of any of the keys, as is quite apparent, will cause rocking of the bail 39. In Fig. 2, the bail 39 is shown as having depending therefrom a pivoted hook 59 which cooperates with the lower extended blade 7 of a contact 60 so that upon anti-clockwise rockposition and also to hold the free end of hook 59 in cooperation with the blade of contact 60. In Figs. 3 and 9, a bar 40 is shown as being centrally located in the machine and as being pivoted at 41. The forward or left hand end of the bar 40 is provided with a notch 42 disposed immediately above the bail 39, and the rear or right hand end of the bar has pivoted connection to a solenoid plunger 43 cooperating with a solenoid 44. A spring 45 tends to rock the bar 40 in a counterclockwise direction and deenergization of the solenoid 44 by releasing the plunger 43 will permit it to do so. Such rocking of the bar 40 will lower the notch 42 upon the bail 39 and prevent counterclockwise rotation of the bail so that whenever solenoid 44 is deenergized the consequent locking of the bail 39 due to the manner of its cooperation with the interposer bars 24 will prevent the operation of any of the keys 25 since in order to depress any key, its corresponding interposer must be free to move to the left.

Operation of the analyzing brashes In Figs. 2 and 7, each of the analyzing brushes 13 adapted to make contact with roller 14 through a hole in the card is connected to a related spring contact plate 46 with which it makes sliding contact. In Fig. 8 a brush 13 0 is provided to furnish current to the common roller 14. The series of brushes 13 and brush 13a are adapted to bear against thecontact roller 14 and are carried by an insulated brush holder 47, secured between a pair of side plates 48 of a yoke or bail-shaped member designated generally by reference numeral 49. Each side plate 48 of the yoke-shaped frame 49 is suspended or supported at its upper end by a link 50 pivoted to the frame portion 51 and at its lower end the plates 48 are supported by means of a parallel link 52.

Intermediate each plate 48 and related link 52 is a toggle plate linkage member 53 which is pivoted upon a spring stud 54 securely fastened to the frame member 51. The end of the link 52 distant from its connecting point to the toggle plate 53 is pivotally secured to an armature structure 55, the latter being pivoted at 56 to the frame member 51. The armature structure is attracted against the tension of a spring 5'7 when a magnet 58 is energized at which time the counterclockwise rocking movement of each toggle plate 53 about its pivotal point 54 will be effective to elevate the frame 49 resulting in the contact of the individual analyzing brushes 13 with the contact roll 14. That is, energization of magnet 58 will move the parts in question from the position of Fig. 7 to that shown in Fig. 2. The purpose of thus raising and lowering the brushes 13 and 13a into and out of cooperation with the roller 14 is to prevent injury to the brushes due to movement of the card toward the right.

The circuit to the magnet 58 is adapted to be broken upon movement of the card carriage to the right. This is accomplished in the following manner: (see Figs. 1, 4 and 5) is a handle 64 having an offset projection 65 cooperating with a rod 66 mounted in a shaft 67. Movement of the card carriage to the right through handle 64 will rock the shaft 67 through the medium of projections 65 and rod 66. The shaft 67 has depending therefrom a pin 68 which cooperates with the blade of contact 69 to open said contact whenever the carriage is moved to the right. Referring to the wiring diagram in Fig. 6, the brush magnet 58 Pivoted to the card carriage at 63 i Wiring diagram In Fig. 6, each of the contacts 29 is shown as being connected to a brush 13 and a common bus bar '10 which is connected to one side of the circuit '71. In connection with the explanation of the wiring of the machine, the various conditions which may exist to effect the operation will now be explained.

Correct perforations Assuming a card column about to be verified to contain a correct perforation, that is, a key which is depressed when such column is in analyzing position, corresponds with the location of the perforation in such column. Upon arrival of the column in question at the analyzing brushes, a circuit will-be completed immediately from the line 71, bus bar 70, contact 29 and brush 13 of the index point position in which the perforation occurred, contact roller 14, common brush 13a, wire '72, resistance '73, magnet 44, relay magnet 74, back to the other side of line 75. Thus far the mere presentation of the perforation to the analyzing position will energize the magnet 44 to unlock the common bail 39 so that a key 25 may be depressed.

The energization of the relay magnet 74 is.

adapted to open its associated contacts 74a which are in series circuit with the escape magnet 34. If now the key 25 corresponding to the indexpoint perforation which is under the brushes and which has established the circuit just described is depressed, it will cause the openingof its corresponding contact 29 at the same time rocking "the bail 39 to close contact 60. The opening of the contacts 29 will interrupt the circuit through magnets 44 and 74 whereupon the relay contacts 74a will close to complete the circuit through escape magnet 34 from line 71, through contact 60, contact 74a, to the other side of line '75, and the card will be advanced to the next column.

Incorrect perforations Where the card column to be verified contains incorrect perforations, that is, where a column should contain a single hole in a particular position and this hole is punched in another position, or more than one hole is punched in the column, the circuits involved will be as presently traced. In the case of a single hole. in the wrong place, the circuit through magnets 44 and '14 will be established as in the case of a correct perforation but upon depression of a ;key other than the one corresponding to the perforated position, this circuit through the magnets will not be broken, and the closure of contact 60 by the depression of such key will not energize magnet 34 since the relay contacts 74a are still open.

Omitted perforations the card from the verifying' position a..special key (Figs. 1 and 9) is provided which upon depression will close a contact 81 to short circuit contacts 60 and 'I4a,and energize magnet 34.

Skipping columns Key 80 may be depressed to pass over columns 89 Where a column of the card contains multiple 9O punching, as in cases where code is used, the magnets 44 and '74 will be energized as before to unlock bar 40 and open relay contacts 74a. In order, however, to complete the circuit through magnet 34, the various keys 25 which correspond to the index point positions involved in the multiple punching must be depressed to break the various circuits through contacts 29 which supply energy to magnets 44 and 74. Where the keys which are depressed correspond to the punch po- 10o sitions contact 74a will close and the card carriage will advance one step.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification it will be understood that various omissions and substitutions and changes in the form and de tails of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the followingclaims:

1. In a machine of the class described, means for sensing perforations in index-point positions of a column of a record card, manually operable devices, one for each index-point position, means normally locking said devices against operation and means controlled by said sensing means upon sensing a perforation in any index-point position for causing said lockingmeans to unlock said devices.

2. In a machine of the class described,.in combination, a card carrier adapted to receive a punched card; an escapement to control the movement of the card carrier, a magnet to oping said circuit upon registration of a hole in the card with a verifying brush, a series of keys corresponding to the'series of brushes and means operable upon depression of the key corresponding to the hole in the card to reclose said circuit.

3. In a machine of the class described, in combination, a card carrier adapted to receive a punched record card, an escapement mechanism to control the' movement of the card carrier; a series of verifying brushes, disposed adjacent to the card; a series of keys; means including a movable bail controlled by the keys and having opcrating connections with the escapement mechanism to operate the same upon operation of one of said keys, means controlled by said verifying brushes for locking said keys against operation when an unperforated column of the card is presented to the verifying brushes whereby said bail is prevented from operating said escapement mechanism. i

4. In a machine of the class described, a card carrier adapted to receive a perforated record card, a plurality of sensing means for analyzing said card, means for advancing the card carrier, a plurality of manually operable devices corresponding to said sensing means, means for normally locking said devices against operation, means controlled by said sensing means for causing said locking means to unlock all of said devices upon the presentation of a perforation to said sensing means and further means controlled by said sensing means for preventing the operation of said advancing means when the manually operable device operated does not correspond to the controlling sensing means.

5. In a machine of the class described, a card carrier adapted to receive a perforated record operation of said advancing means when the keys I depressed do not correspond in number and position to the sensing means cooperating with .the

presented perforations in said card. 1

FRED ROLLAND JONES. 

